##### AUTHOR #### Pablo G. Perez-Gonzalez ##### TITLE #### An unbiased spectro-photometric survey of passively evolving galaxies at z>1 in GOODS-N ##### ABSTRACT #### I will describe the spectro-photometric survey of passively evolving that will be carried out with the OSIRIS instrument on the Spanish 10.4 meter telescope (GTC). This is a Large Program awarded by ESO with 20 nights in 2010. It will obtain imaging in 25 contiguous medium-band (17 nm wide) filters covering the 500 to 950 nm wavelength range.